OPTICAL GLASS AND OPTICAL ELEMENT
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Dec 22, 2023
filing date -
Dec 27, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
The optical glass has, in mass %, SiO2 content of 3.00% or more and 20.00% or less, B2O3 content of 1.00% or more and 18.00% or less, La2O3 content of 20.00% or more and 60.00% or less, Nb2O5 content of 8.80% or more, TiO2 content of 5.00% or more and 20.00% or less, total content (MgO+CaO+SrO+BaO+ZnO) of 2.00% or more, mass ratio ((MgO+CaO+SrO+BaO+ZnO)/(SiO2+B2O3)) of 0.300 or more, mass ratio ((Nb2O5+TiO2+ZrO2+WO3)/(SiO2+B2O3)) of 1.600 or more, mass ratio ((La2O3+Gd2O3+Y2O3)/(SiO2+B2O3)) of 2.750 or more, mass ratio ((MgO+CaO+SrO+BaO+ZnO)/(Nb2O5+TiO2+ZrO2+WO3)) of 0.290 or less, and mass ratio ((Nb2O5+TiO2)/(SiO2+B2O3)) of 1.400 or more.
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